Test ACURA TL 1995 Service Repair Manual

ABS Functio n Tes t
1. Rais e th e ca r of f th e ground , an d suppor t i t wit h safet y
stand s (se e sectio n 1 ).
2 . Chec k tha t ther e is n o brak e drag .
3 . Tur n th e ignitio n switc h O N (II) , an d confir m tha t th e
AB S indicato r ligh t come s on .
I f th e AB S indicato r ligh t doe s no t com e on , follo w
th e troubleshootin g o n pag e 19-60 .
4 . Hond a PG M Tester : Connec t th e PG M Teste r a s
describe d i n th e PG M Teste r Anti-Loc k Brak e
Syste m (ABS ) Vehicl e Syste m Supplement . Follo w
th e tester' s prompt s instea d o f step s 5 throug h 1 1
o f thi s procedure .
AL B Checker : Wit h th e ignitio n switc h OFF , discon -
nec t th e AB S inspectio n connecto r (6P ) fro m th e
connecto r cove r locate d unde r th e glov e box , an d
connec t i t t o th e AL B checker . Continu e wit h step s 5
throug h 1 1 o f thi s procedure .
ALB CHECKE R07HAJ-SG0010 BSee pag e 19-34 for othe r applicabl e checkers .
AB S INSPECTIO N
CONNECTO R (6P )
5. Shif t th e transmissio n t o [P ] position .
6 . Star t th e engin e an d releas e th e parkin g brake .
7. Tur n th e Mod e Selecto r switc h t o "1" .Monito r Light s
Power O N Star t Tes t Mod e Selecto r8. Pus h th e Star t Tes t switch .
Th e AB S indicato r ligh t shoul d no t com e o n whil e
th e Tes t i n Progres s ligh t i s on .
I f th e AB S indicato r ligh t come s on , confir m th e
DT C an d perfor m th e appropriat e troubleshootin g
fo r th e code .
NOTE : D o no t tur n th e Mod e Selecto r switc h whe n
the Tes t i n Progres s ligh t i s on . Damag e t o th e AL B
checke r ca n result .
9 . Tur n th e Mod e Selecto r switc h t o "2" .
10 . Depres s th e brak e peda l firmly , an d pus h th e Star t
Test switch . Th e AB S indicato r ligh t shoul d no t com e
on whil e th e Tes t i n Progres s ligh t i s on . Ther e
shoul d b e kickbac k o n th e brak e pedal .
Hav e th e assistan t chec k tha t th e whee l controlle d b y
th e AB S ca n b e rotate d b y han d whe n ther e i s kick -
bac k o n th e brak e pedal .
I f th e AB S indicato r ligh t come s on , confir m th e
DT C an d perfor m th e appropriat e troubleshoot -
in g fo r th e code .
I f th e AB S indicato r ligh t doe s no t com e o n an d
th e whee l controlle d b y th e AB S canno t b e rotated ,
chec k th e connectio n o f th e modulato r wir e har -
nes s connectors . I f th e connection s ar e OK , replac e
th e modulato r unit .
NOTE : Th e kickbac k shoul d occu r approximatel y 2 0
second s afte r th e Star t Tes t switc h is pushed .
Th e AB S ca n b e checke d wit h a brak e tester , too , b y
checkin g th e brak e torqu e fluctuatio n o f th e whee l
controlle d b y th e ABS .
11 . Tur n th e Mod e Selecto r switc h t o "3" , "4 " an d "5" .
Perfor m ste p 1 0 fo r eac h o f th e tes t mod e positions .
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Modulator Uni t
Brak e Flui d Replacement/Bleedin g (cont'd )
6. Star t th e engin e an d le t i t idl e fo r a minute . Sto p th e
engine .
7 . Chec k th e brak e flui d leve l i n th e reservoir . I t shoul d
b e belo w th e MA X (upper ) leve l line .
8 . Repea t th e step s 4 throug h 7 to drai n th e res t o f th e
brak e flui d fro m th e modulato r unit .
NOTE : Th e modulato r ha s a capacit y o f approximatel y
150 ( 5 fl-oz , 5. 3 Imp-oz) . Approximatel y 3 5 - 4 5
(1 1/6- 1 1/ 2 fl-oz , 1.2-1. 6 Imp-oz ) o f th e flui d i s
draine d a t eac h try .
9 . Remov e th e cap , an d refil l th e reservoi r t o th e MA X
(upper ) leve l wit h fres h brak e fluid .
NOTE : Pou r th e brak e flui d slowl y s o tha t i t doe s no t
foam , an d wai t fo r a fe w minutes .
10.
CA P
MA X (UPPER ) LEVE LLINE
Repea t step s 4 throug h 7 twice , an d refil l th e reser -
voi r t o th e MA X (upper ) leve l wit h fres h brak e fluid .
11 . Tighten the maintenanc e bleede r t o th e specifie d
torque .
12 . Afte r replacement , star t th e engin e an d mak e sur e
tha t th e AB S indicator light goe s off .
Bleeding :
NOTE: Th e AB S ca n als o b e ble d b y usin g th e PG M
Teste r an d th e AB S Diagnosti c Ki t t o ru n th e AB S pump .
Connec t th e teste r an d modul e A as describe d i n th e
PG M Teste r Anti-Loc k Brak e Syste m (ABS ) Vehicl e
Syste m Supplement , the n follo w th e tester' s prompt s
instea d o f thi s procedure .
Whe n th e brak e flui d i s completel y draine d fro m th e
reservoi r (ai r enter s i n th e modulato r unit ) durin g brak e
fluid replacement , blee d th e ai r fro m th e modulato r uni t
as follows .
1 . Fil l th e reservoi r t o th e MA X (upper ) leve l wit h fres h
brak e fluid .
2 . Connec t th e rubbe r tub e t o th e bleede r o n th e mod -
ulato r unit , an d se t th e othe r en d o f th e rubbe r tub e
i n a containe r (se e page 19-115 ).
3 . Loose n th e bleeder , an d star t th e engin e t o activat e
th e pum p motor .
NOTE : Tak e car e no t t o spil l th e brak e flui d fro m
th e container .
4 . Tighte n th e bleede r whe n th e flui d start s t o flo w ou t
o f th e bleeder .
5 . Sto p th e engin e afte r th e pum p moto r stop s
NOTE : I f th e AB S indicato r ligh t come s o n an d th e
pum p moto r stops , restar t th e engin e an d repea t
step s 3 throug h 5 above .
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Operation

ABS Control Unit

Main Control

The ABS control unit detects the wheel speed based on the wheel sensor signal it received, then it calculates the vehicle

speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration based on the

rate of deceleration.

The ABS control unit calculates the slip rate of each wheel, and it transmits the control signal to the modulator unit

solenoid valve when the slip rate is high.

The pressure reduction control is a three-mode system, that is pressure reduction, pressure retaining and pressure intensi-

fying modes.

ABS CONTROL UNIT

Self-diagnosis Function

The ABS control unit is equipped with a main CPU and a sub CPU, and the CPUs check each other.

The CPUs check the circuit of the system.

The
self-diagnosis
can be
classified
into
two
categories.

Initial diagnosis

Regular diagnosis

On-board Diagnosis Function

The ABS control unit is connected to the data link connector.

The ABS system can be diagnosed with the Honda PGM Tester.ProCarManuals.com

Troubleshooting Precautions

Kickback

1. The motor operates when the ABS is functioning, and the fluid in the reservoir is forced out to the master cylinder

causing kickback at the brake pedal.

Pump Motor

1. The pump motor operates when the ABS is functioning.

2. The ABS control unit checks the pump motor operation during initial diagnosis and vehicle starts. You may hear the

faint operation sound at this time, but it is normal.

Brake Fluid Replacement/Air Bleeding

1. Brake fluid replacement and air bleeding procedures are the same as vehicles without ABS. To ease bleeding, start

with the front wheels.

Troubleshooting

1. The troubleshooting flowcharts procedures assume that the cause of the problem is still present and the ABS indica-

tor light is still on. Following the flowchart when the ABS indicator light does not come on can result in incorrect

judgment.

2. Question the customer about the conditions when the problem occurred, and try to reproduce the same conditions

for troubleshooting.

Find out when the ABS indicator light came on, such as during initial diagnosis, during ABS control, after ABS con-

trol, when the vehicle started, when vehicle speed was at 19 mph (30 km/h), when the problem continued for a few

seconds or a few minutes, etc.

3. When the ABS indicator light does not come on during the test-drive, but the troubleshooting is performed based on

the DTC, check for the loose connectors, poor contact of the terminals, etc, before troubleshooting.

4. After troubleshooting, erase the DTC and test-drive the vehicle. Be sure that the ABS indicator light does not come on.

5. The connector illustrations show the female connectors with a single outline and the male connectors with a double

outline.ProCarManuals.com

Diagnostic Troubl e Cod e (DTC )
Diagnosti c Troubl e Cod e (DTC ) Indicatio n (SC S Mode )
NOTE: Thi s operatio n ca n als o b e don e wit h th e Hond a PG M Tester .
1 . Connec t th e SC S servic e connecto r t o th e servic e chec k connecto r (2P ) unde r th e glov e box .
2 . Tur n th e ignitio n switc h O N (II ) withou t brak e peda l depressed .
NOTE : I f th e brak e peda l i s depresse d whe n turnin g th e ignitio n switc h O N (II) , th e syste m shift s t o ME S mode .
3 . Th e blinkin g frequenc y indicate s th e DTC .
NOTE : I f th e DT C is no t memorized , th e AB S indicato r ligh t goe s of f fo r 3. 6 second s an d the n stay s on .
4 . Tur n th e ignitio n switc h OFF , an d remov e th e SC S servic e connector .
NOTE : Th e Malfunctio n Indicato r Lam p (MIL ) wil l sta y o n afte r th e engin e i s starte d i f th e SC S servic e connecto r i s
connected .
Condition s fo r DT C indicatio n
Vehicl e spee d is a t 6 mp h (1 0 km/h ) o r less .
Th e SC S servic e connecto r i s connecte d befor e th e ignitio n switc h i s turne d O N (II) .
Th e brak e peda l i s released .
SCS SERVIC E CONNECTO R07PAZ - 001010 0
SERVIC E CHEC KCONNECTO R (2P )
ABS INDICATO R LIGH T
When ignitio n switc h i s turne d O N (II) , th e AB S indicato r ligh t come s o n fo r tw o second s t o chec k th e bulb . D o no t
coun t thi s a s a DTC .
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Diagnostic Trouble Code (DTC)

DTC Erasure (MES Mode)

NOTE: This operation can also be done with the Honda PGM Tester.

1. Connect the SCS service connector to the service check connector (2P) under the glove box.

2. Depress the brake pedal.

3. Turn the ignition switch ON (II) while keeping the brake pedal depressed.

4. After the ABS indicator light goes off, release the brake pedal.

5. After the indicator light comes on, depress the brake pedal again.

6. After the indicator light goes off, release the brake pedal again.

7. After few seconds, the indicator light blinks twice and the DTC is erased. If the indicator light does not blink twice,

repeat steps 1 through 6. If the indicator light stays ON after the indicator light blinks twice, check the DTC because a

problem was detected during initial diagnosis before shifting to MES mode.

8. Turn the ignition switch OFF, and remove the SCS service connector.

Conditions for DTC erasure

Vehicle speed is at 6 mph (10 km/h) or less.

The SCS service connector is connected before the ignition switch is turned ON (II).

The brake pedal is depressed before the ignition switch is turned ON (II).ProCarManuals.com

Troubleshooting Inde x
NOTE : Thi s operatio n ca n als o b e don e wit h th e Hond a PG M Tester .
REFERTOPAG E
19-14 2
19-14 4
19-145
19-146
19-147
19-148
19-151
19-152
19-153
19-156
19-158
19-160
19-161
19-161
*1: Whe n th e proble m is detecte d an d AB S Indicato r ligh t come s on , th e indicato r ligh t wil l sta y o n unti l th e ignitio n switc h is
turne d fro m OF F to O N (II) , an d th e contro l uni t confirm s tha t th e syste m is O K whe n th e vehicl e starts .
*2 : Whe n voltag e return s normal , th e AB S indicato r ligh t goe s off .
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Modulator Unit

Removal/Installation

CAUTION:

Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid does contact the paint, wash it off

immediately with water.

Take care not to damage or deform the brake lines during removal and installation.

To prevent the brake fluid from flowing, plug and cover the hose ends and joints with a shop towel or equivalent

material.

NOTE: Tighten the flare nuts to 15 N-m (1.5 kgf-m, 11 Ibf-ft).

Removal

1. Disconnect the modulator unit 10P and pump motor 2P connectors.

2. Remove the proportioning control valve.

3. Disconnect the brake lines, then remove the modulator unit.

Installation

1. Install the modulator unit, then connect the brake lines.

2. Install the proportioning control valve.

3. Connect the modulator unit 10P and pump motor 2P connectors.

4. Bleed the brake system, starting with the front wheels.

5. Start the engine, and check that the ABS indicator light goes off.

6. Test-drive the vehicle, and check that the ABS indicator light does not come on.

MODULATOR UNIT

10P CONNECTOR
From right-front

From left-front

PUMP MOTOR

2P CONNECTOR

6 mm BOLT

9.8 N-m (1 .0 kgf-m, 7 Ibf-ft) PROPORTIONING

CONTROL

VALVE

6 mm NUT

9.8 N-m (1.0 kgf-m, 7 Ibf-ft)

BRACKET
RUBBER MOUNT

MODULATOR UNIT

8 mm BOLT

22 N-m (2.2 kgf-m, 16 Ibf-ft)ProCarManuals.com

Wiring/Connector Location s
BLOWER MOTO R RELA Y
(Locate d o n th e under-das h rela y box )
Test , pag e 22-5 7 HEATE
R VALV E CONTRO L SOLENOI D
VALV E CONNECTO R
SUNLIGH T SENSO R
Replacement , pag e 22-5 5
Test , pag e 22-5 5
COMPRESSO R CLUTC H RELA Y
CONNECTO R
Wir e colors : WHT , RED ,
YEL/BLK , RED/BL U
Test , pag e 22-5 7
COMPRESSO R CLUTC H
CONNECTO R
A/ C PRESSUR E SWITC H
CONNECTO R
OUTSID E AI R TEMPERATUR E SENSO R
Replacement , pag e 22-5 4
Test , pag e 22-5 4
CONDENSE R FA N CONNECTO R CONDENSE
R FA N RELA Y CONNECTO R
Wir e colors : WHT , YEL/WHT ,
WHT/GRN, L T GRN/YE L
Test , pag e 22-5 7
RADIATO R FA N RELA Y CONNECTO R
Wir e colors : WHT , YEL ,
WHT/BL U an d L T GRN/YE L
Test , pag e 22-5 7
RADIATO
R FA N
CONNECTO RMAI
N WIR E
HARNES S
RADIATO R FA N CONTRO L MODUL E
(Locate d unde r righ t sid e o f dash )
Test , page , 22-4 8
NOTE : Refe r t o page 22-3a of the '96-9 8 Acura
3.2TL Servic e Manual supplement for the differences
on this page for the 3.2TL.
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SRS component s ar e locate d in thi s area . Revie w th e SR S componen t locations , precautions , an d procedure s in th e SR S
( sectio n 24 ) befor e performin g repair s o r service .
RECIRCULATIO N CONTRO L MOTO R
Replacement , pag e 22-5 2
Test , pag e 22-5 2
MOD E CONTRO L MOTO R
Replacement , pag e 22-5 1
Test , pag e 22-5 1 AI
R MI X CONTRO L MOTO R
Replacement , pag e 22-5 0
Test , pag e 22-5 0
IN-CA R TEMPERATUR E SENSO R
Replacement , pag e 22-5 3Test, pag e 22-5 3 BLOWE
R MOTO R HIG H RELA Y
Test , pag e 22-5 7
BLOWE R MOTO R
CONNECTO R
POWE R TRANSISTO R
Test , pag e 22-5 6
CLIMAT E CONTRO L UNI T
Replacement , pag e 22-4 9
Bul b Replacement , pag e 22-4 9 EVAPORATO
R TEMPERATUR E SENSO R
Test , pag e 22-5 6
HEATE
R SUB-HARNES S
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